Shock-absorber.



WILLIAM J. CASEY, OF CHICAGO, LLENES.

SHOCK-BSORBER.

Application tiled 'o'verfb To all echo/n it 'may concern.:g f

Be it known that I, WILLIAM if? a citizen of the United States, residingChicago, Cook county, illinois, have invented certain new and usefulImprovments in Shock-Absorbers, of which the following is aspeciiication.

My invention relates to shook absorbers intended more particularly butnot 4necessarily for' automobiles and the object thereof is to providele simple and efficient device of this character.

The various features ofv advantage and utility Will be apparent from thedescription hereinafter given.

In the drawing Figure 1 is an end clevetion of my shock absorber showingthe springs of an automobile und also the frame in section; Fig. 2 aside elevation thereof' showing a portion oir the shock absorber incross section. and .F ig. 3 a horizontal section on the line 3"3 of Fig.2.

It will be understood that owing to di lierences in the construction ofdifferent automobiles changes are necessary in the details of theembodiment of my invention, per ticularly the manner of attachment tothe spring members or to a spring member und a part of the frame inorder to accommodate the situations presented. It will also beunderstood that my invention may be used in connection with differenttypes of spring suspension as for instance the semi-elliptic, thethree-quarter elliptic and the 'full elliil' tic. ln the presentinstance the embodiment muyl be considered as one applicable' to eitherthe threenuarter elliptic or the full elliptic'V spring suspension.

Referring to the embodiment of my in vention as herein shown, the frameof the automobile is illustrated at' 1 and provided with e. suitablebracket 9, having proper spring clips 3 'for engaging and holding theupper spring member 4. The lower spring member 5 is secured by means ofthe clips 6 to tbe running geur or axle '7. My shock absorber is locatedbetween the tn'o members of the spring at or tow-.1rd the middle por`tion thereof.

The upper spring member 4 provided with an additional spring clip 8having a laterally extending stud 9 on which is mounted a dependingshaft or plunger 10 capable of slight oscillating movement on the stud9. This plunger is held in place by means of the nut 11 screwing intothe outer end Specification of Letters intent.

piunger is of singuiar ing in the present insquare formation but 2.).inn as to its end pon tions pre o); twisting. Only the end portions.fire th. s twisted or otherwise made so as to produce this spiral orhelical formw.

tion, the central or intermedia-te portion in dicated et 10b retainingits substantially straight formation.

VIn the particular the drew-inc lower member being a rictionally helduut 12 although it Wiii be understood that the said relative position ofthe members may be reversed.

embodiment shown in i the snafr't or plunger 10 con stitutes the upperone of two members, the.l

As shown, the nut i2 is provided withl a central bore having the saineforni es the section oi: the plunger. The nut is mounted Within a casing13 formed at the upper end of a bracket 14 which is anchored in anysuitable manner to the lower .member nut 12 whose top and'bottom fecesbear di-l rectly against the two Washers 18 and 19 made of fiber. orvother suitable material.

The washer 18 interposed between the lower face of the nut and thebottom of the casing while the upper washer 19 is-interj lposeo betweensuch nut and the inner face of ,the cap 17. fit will be understood thatby screwing the cap 17 downwardly the frietional resistance is increasedand by screw ing such cap upwardly the resistance is lessened. The capis adapted to be locked in any pcsition und for this purpose such cap isin the form of a sp'iit ring with two parallel lugs 2G twhich aieclamped together by means oi the clamping bolt 21. After the properadjustment is obtained 'the cap is locked in position by means of thisbolt.

The normal position ofthe parts is shown in the drawings vaccording towhich the nut occupies a substantially middle portion of the plunderwhich is the straight portion. This straight portion is of such lengththat ordiienry or rather light shocks or spring mi?" ents are taken careof by the springs the". isv aids l'es, it being understood that the nutpt ed to move ireely downwardly and upwardly with respect to theplunger, that is witlnut any oscillation or rotation of the nut andtroneo ly Without any resistance from the hoch'. o However, in case of aConsiderable ina-)rement of either' spring member upwardly ordownwardly, the spiral formation of the plunger Will he presented to thenrt und the nut will he caused to turn and such tu nog will he resisted'oy reason o f the "Washers lz und 1.9 und the shocks will therebynhs-or? f d too grenteX- tremee et' namen' w.. i f rent-ed.

l claim:

l. A shook absorber oon'iprising o. shaft or plunger of spiralformation. et its end portions and of straight formation et its middleportioni and n frietionolly held member through which such plungerWorks.

2. A shock aheorher oompi's'ng a. shaft or plunger angular in crossvseetion and having its entre helieallj; twisted and its middle portion.Straight., and n frictionally held member through, which euch plungerworks.

A shoot; e' :orher comprising a shaft or plunger oi spiral formation atits end portione and of straight formation at its middle portion,easing, a nut which is rietionu held in the easing und through which theplunger works, and menus in the easing for imparting 'frietionolresistance to the nut. l

4. A shook absorber comprising a shaft or plunger of spiral formation atits end portions end of straight formation at its middle portion, aeasing, e nut which is rietionally held in the casing and through whichthe plunger Works, and means in the easing for imparting rietionalresistance to the nut consisting of washers on opposite sides of thenut.

5. A shock aheorher comprising a shaft or plunger of spiral formation atits end portions and of straight formation at its middle portion, aeasing, e not which is arranged Within thel casing and throu h which theplunger wor Is, and ineens on tie easing for regulating the degree offrictionol resistance of the nut.

6. A shock absorber comprising a shaft or plunger of spiral formation atvits end portions and of'etraight formation at its middle portion. oeasing, e nutl which is arranged Within the casing and through which theplunger works. and means on the easing VAtor if# loting the degree offrie- 'tionel ree'etzince of the nut Consisting of a. cap screwing ontothe casing und clamping the nut therewithin.

7. A shook uhqrrher comprising a Shaft or plunger of spiral Jformationat its end portions and of str-ight formation at its middle portion, u.euc'ng, u nut which is arranged within the easing and through which theplunger Works, end means on the casing for regulating the degree or"friotional resistance of the nut consisting of a split ring Cup screwingonto the easing; and adopted to impart friotional resistm'iee to the nutwithin, and zt clamping holt for the cap.

8. A shook lAbsorber comprising a shaft or plunger of spiral formationet its end portions :1nd of Straight formation at its middle portion,and a. frietionally held nut through which such plunger Works, a easing,a nut which. is arranged Within'the casing and th rough which theplunger Works, friction rfziShers in the Gesine and on opposite faces ofthe nut, and e oep on the casing for binding the nut and uf'aeherstogether `with a frictional resistance.

VILLIAM J. CASEY.

lVit-nesses S. F. Hiermit, Ronnn'r DoeERMAN.

